Merge pull request #618 from DavideD/vert.x-web-mutiny

Hibernate Reactive + Vert.x Web routing + Mutiny quickstart

README.md

@@ -45,6 +45,7 @@ See [CONTRIBUTING](CONTRIBUTING.md) for how to build these examples.
 * [Amazon SNS](./amazon-sns-quickstart): How to connect to an Amazon SNS (Simple Messaging Service)
 * [Amazon SQS](./amazon-sqs-quickstart): How to connect to an Amazon SQS (Simple Queue Service)
 * [Hibernate Reactive and RESTEasy](./hibernate-reactive-quickstart): Exposing a CRUD service over REST using Hibernate Reactive to connect to a PostgreSQL database
+* [Hibernate Reactive and Vert.x Web](./hibernate-reactive-routes-quickstart): Exposing a CRUD service with Reactive Routes using Hibernate Reactive to connect to a PostgreSQL database
 * [Hibernate ORM and RESTEasy](./hibernate-orm-quickstart): Exposing a CRUD service over REST using Hibernate ORM to connect to a PostgreSQL database
 * [Hibernate ORM with Panache and RESTEasy](./hibernate-orm-panache-quickstart): Exposing a CRUD service over REST using Panache to connect to a PostgreSQL database
 * [Hibernate ORM Multitenancy](./hibernate-orm-quickstart-multi-tenancy): Multitenant CRUD service over REST using Hibernate ORM to connect to a PostgreSQL database (schema or database approach)

hibernate-reactive-routes-quickstart/.dockerignore

@@ -0,0 +1,4 @@
+*
+!target/*-runner
+!target/*-runner.jar
+!target/lib/*

hibernate-reactive-routes-quickstart/.gitignore

@@ -0,0 +1,35 @@
+# Eclipse
+.project
+.classpath
+.settings/
+bin/
+
+# IntelliJ
+.idea
+*.ipr
+*.iml
+*.iws
+
+# NetBeans
+nb-configuration.xml
+
+# Visual Studio Code
+.vscode
+
+# OSX
+.DS_Store
+
+# Vim
+*.swp
+*.swo
+
+# patch
+*.orig
+*.rej
+
+# Maven
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+release.properties

hibernate-reactive-routes-quickstart/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.5";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

hibernate-reactive-routes-quickstart/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.2/apache-maven-3.6.2-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.5/maven-wrapper-0.5.5.jar

hibernate-reactive-routes-quickstart/README.md

@@ -0,0 +1,118 @@
+# Quarkus demo: Hibernate Reactive and Vert.x Web
+
+This is a minimal CRUD service exposing a couple of endpoints over REST,
+with a front-end based on Angular so you can play with it from your browser.
+
+While the code is surprisingly simple, under the hood this is using:
+ - Vert.x Web routers to expose the REST endpoints
+ - Hibernate Reactive to perform the CRUD operations on the database
+ - A PostgreSQL database; see below to run one via Docker
+ - ArC, the CDI inspired dependency injection tool with zero overhead
+
+## Requirements
+
+To compile and run this demo you will need:
+
+- JDK 1.8+
+- GraalVM
+
+In addition, you will need either a PostgreSQL database, or Docker to run one.
+
+### Configuring GraalVM and JDK 1.8+
+
+Make sure that both the `GRAALVM_HOME` and `JAVA_HOME` environment variables have
+been set, and that a JDK 1.8+ `java` command is on the path.
+
+See the [Building a Native Executable guide](https://quarkus.io/guides/building-native-image)
+for help setting up your environment.
+
+## Building the demo
+
+Launch the Maven build on the checked out sources of this demo:
+
+> ./mvnw install
+
+## Running the demo
+
+### Prepare a PostgreSQL instance
+
+Make sure you have a PostgreSQL instance running. To set up a PostgreSQL database with Docker:
+
+> docker run --ulimit memlock=-1:-1 -it --rm=true --memory-swappiness=0 --name quarkus_test -e POSTGRES_USER=quarkus_test -e POSTGRES_PASSWORD=quarkus_test -e POSTGRES_DB=quarkus_test -p 5432:5432 postgres:10.5
+
+Connection properties for the Agroal datasource are defined in the standard Quarkus configuration file,
+`src/main/resources/application.properties`.
+
+### Live coding with Quarkus
+
+The Maven Quarkus plugin provides a development mode that supports
+live coding. To try this out:
+
+> ./mvnw quarkus:dev
+
+In this mode you can make changes to the code and have the changes immediately applied, by just refreshing your browser.
+
+Hot reload works even when modifying your JPA entities.
+Try it! Even the database schema will be updated on the fly.
+
+### Run Quarkus in JVM mode
+
+When you're done iterating in developer mode, you can run the application as a
+conventional jar file.
+
+First compile it:
+
+> ./mvnw install
+
+Then run it:
+
+> java -jar ./target/hibernate-reactive-routers-quickstart-1.0-SNAPSHOT-runner.jar
+
+Have a look at how fast it boots.
+Or measure total native memory consumption...
+
+### Run Quarkus as a native application
+
+You can also create a native executable from this application without making any
+source code changes. A native executable removes the dependency on the JVM:
+everything needed to run the application on the target platform is included in
+the executable, allowing the application to run with minimal resource overhead.
+
+Compiling a native executable takes a bit longer, as GraalVM performs additional
+steps to remove unnecessary codepaths. Use the  `native` profile to compile a
+native executable:
+
+> ./mvnw install -Dnative
+
+After getting a cup of coffee, you'll be able to run this binary directly:
+
+> ./target/hibernate-reactive-routers-quickstart-1.0-SNAPSHOT-runner
+
+Please brace yourself: don't choke on that fresh cup of coffee you just got.
+
+Now observe the time it took to boot, and remember: that time was mostly spent to generate the tables in your database and import the initial data.
+
+Next, maybe you're ready to measure how much memory this service is consuming.
+
+N.B. This implies all dependencies have been compiled to native;
+that's a whole lot of stuff: from the bytecode enhancements that Hibernate ORM
+applies to your entities, to the lower level essential components such as the PostgreSQL JDBC driver, the Undertow webserver.
+
+## See the demo in your browser
+
+Navigate to:
+
+<http://localhost:8080/index.html>
+
+Have fun, and join the team of contributors!
+
+## Running the demo in Kubernetes
+
+This section provides extra information for running both the database and the demo on Kubernetes.
+As well as running the DB on Kubernetes, a service needs to be exposed for the demo to connect to the DB.
+
+Then, rebuild demo docker image with a system property that points to the DB. 
+
+```bash
+-Dquarkus.datasource.reactive.url=jdbc:postgresql://<DB_SERVICE_NAME>/quarkus_test
+```